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<head>
    <meta charset="UTF-8">
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        function mynine(num) {
            for (var i = 1; i <= num; i++) {
                for (var j = 1; j <= i; j++) {
                    document.write(j + '*' + i + '=' + j * i + ' ');
                }
                document.write('<br />');
            }
        }

        mynine(7);

        var test = function (num) {
            for (var i = 1; i <= num; i++) {
                for (var j = 1; j <= i; j++) {
                    document.write(j + '*' + i + '=' + j * i + ' ');
                }
                document.write('<br />');
            }
        }
        test(7)
    </script>
</body>

</html>